The acceleration of the reciprocating roller follower when it has contact with the straight flanks of the tangent cam, is given by

The velocity of the reciprocating roller follower when it has contact with the straight flanks of the tangent cam, is given by (where $$\omega $$ = Angular velocity of the cam shaft)

A

$$\omega \left( {{{\text{r}}_1}{{\text{r}}_2}} \right)\sin \theta $$

B

$$\omega \left( {{{\text{r}}_1} + {{\text{r}}_2}} \right)\sin \theta \sec 2\theta $$

C

$$\omega \left( {{{\text{r}}_1}{{\text{r}}_2}} \right)\cos \theta $$

D

$$\omega \left( {{{\text{r}}_1} + {{\text{r}}_2}} \right)\cos \theta \,{\text{cosec2}}\theta $$

In a circular arc cam with roller follower, the acceleration in any position of the lift will depend only upon

A

Total lift, total angle of lift, minimum radius of cam and cam speed

B

Radius of circular arc, cam speed, location of centre of circular arc and roller diameter

C

Mass of cam follower linkage, spring stiffness and cam speed

D

Total lift, centre of gravity of the cam and cam speed

The acceleration of a flat-faced follower when it has contact with the flank of a circular arc cam, is given by

A

$${\omega ^2}{\text{R}}\cos \theta $$

B

$${\omega ^2}\left( {{\text{R}} - {{\text{r}}_1}} \right)\cos \theta $$

C

$${\omega ^2}\left( {{\text{R}} - {{\text{r}}_1}} \right)\sin \theta $$

D

$${\omega ^2}{{\text{r}}_1}\sin \theta $$

A cam with a roller follower would constitute following type of pair

A

Lower pair

B

Higher pair

C

Open pair

D

Close pair

The period during which the cam follower remains at rest, when cam moves, is known as

A

Constant period

B

Fixed period

C

Dwell period

D

Idle period

Choose the sentence (s) in which the word 'straight means 'honest or frank'. (1) Draw a straight line through the two points. (2) You are not being straight with me, even though you know that I like straight answers. (3) It was a straight choice between taking or leaving the offer of friendship.

A

(1)

B

(3)

C

(1) and (2)

D

1) and (3)

The primary unbalanced force due to inertia of reciprocating parts in a reciprocating engine is given by (where m = Mass of reciprocating parts, $$\omega $$ = Angular speed of crank, r = Radius of crank, $$\theta $$ = Angle of inclination of crank with the line of stroke and n = Ratio of the length of connecting rod to radius of crank)

A

$${\text{m}}{\omega ^2}{\text{r}}\sin \theta $$

B

$${\text{m}}{\omega ^2}{\text{r}}\cos \theta $$

C

$${\text{m}}{\omega ^2}{\text{r}}\frac{{\sin 2\theta }}{{\text{n}}}$$

D

$${\text{m}}{\omega ^2}{\text{r}}\frac{{\cos2\theta }}{{\text{n}}}$$

The secondary unbalanced force due to inertia of reciprocating parts in a reciprocating engine is given by (where m = Mass of reciprocating parts, $$\omega $$ = Angular speed of crank, r = Radius of crank, $$\theta $$ = Angle of inclination of crank with the line of stroke and n = Ratio of the length of connecting rod to radius of crank)

A

$${\text{m}}{\omega ^2}{\text{r}}\sin \theta $$

B

$${\text{m}}{\omega ^2}{\text{r}}\cos \theta $$

C

$${\text{m}}{\omega ^2}{\text{r}}\frac{{\sin 2\theta }}{{\text{n}}}$$

D

$${\text{m}}{\omega ^2}{\text{r}}\frac{{\cos2\theta }}{{\text{n}}}$$

The velocity of a flat-faced follower when it has contact with the flank of a circular arc cam, is given by

A

$$\omega {\text{R}}\cos \theta $$

B

$$\omega \left( {{\text{R}} - {{\text{r}}_1}} \right)\cos \theta $$

C

$$\omega \left( {{\text{R}} - {{\text{r}}_1}} \right)\sin \theta $$

D

$$\omega {{\text{r}}_1}\sin \theta $$

The retardation of a flat faced follower when it has contact at the apex of the nose of a circular arc cam, is given by (where OQ = Distance between the centre of circular flank and centre of nose)

A

$${\omega ^2} \times {\text{OQ}}$$

B

$${\omega ^2} \times {\text{OQ}}\sin \theta $$

C

$${\omega ^2} \times {\text{OQ}}\cos \theta $$

D

$${\omega ^2} \times {\text{OQtan}}\theta $$

The acceleration of the reciprocating roller follower when it has contact with the straight flanks of the tangent cam, is given by

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